What is the purpose of a pre-filter in Smarty templates?

A pre-filter in Smarty templates allows you to modify the template content before it is displayed. This can be useful for tasks such as sanitizing input data, adding additional markup, or performing any other necessary modifications to the template output. 

// Example of using a pre-filter in Smarty templates
$smarty = new Smarty();

// Define a custom pre-filter function
function custom_pre_filter($tpl_source, Smarty_Internal_Template $template) {
    // Perform any necessary modifications to the template content here
    $tpl_source = str_replace('foo', 'bar', $tpl_source);

    return $tpl_source;
}

// Assign the custom pre-filter function to Smarty
$smarty->registerFilter('pre', 'custom_pre_filter');

// Display the template
$smarty->display('template.tpl');

Keywords

Smarty templates pre-filter PHP template engine data manipulation

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